package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        //1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> elqw = new LambdaQueryWrapper<>();
        elqw.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(elqw);

        //3、如果没有查询到则返回登录失败结果
        if (emp == null){
            return R.error("登陆失败,没有此用户!");
        }

        //4、密码比对，如果不一致则返回登录失败结果
        if(!emp.getPassword().equals(password)){
            return R.error("登陆失败,密码错误!");
        }

        //5、查看员工状态， 如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus()==0){
            return R.error("账号已禁用，请联系管理员!");
        }

        //6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     * @Param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee,request
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工，员工信息：{}",employee.toString());
        //设置初始密码 123456 需要进行mp5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //设置创建时间
        //employee.setCreateTime(LocalDateTime.now());
        //设置更新时间
        //employee.setUpdateTime(LocalDateTime.now());
        //设置创建人 获得当前登录用户的id
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setCreateUser(empId);
        //设置最后更新人
        //employee.setUpdateUser(empId);
        //添加员工
        employeeService.save(employee);

        return R.success("新增员工成功!");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        log.info("page={},pageSize={},name={}",page,pageSize,name);
        //构造分页构造器
        Page<Employee> pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> lqw = new LambdaQueryWrapper();
        //添加一个过滤条件 模糊查询 like
        lqw.like(!StringUtils.isEmpty(name),Employee::getName,name);
        //添加排序条件 按照更新时间的降序排列 desc降序 asc升序
        lqw.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo,lqw);
        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());

        //employee.setUpdateTime(LocalDateTime.now());
        //获取当前登录用户id
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setUpdateUser(empId);

        //long id = Thread.currentThread().getId();
        //log.info("当前的线程id为：{}" ,id);

        employeeService.updateById(employee);
        //在此发现修改不成功 这里我们使用对象转换器将Long类型转化为String类型
        return R.success("员工信息修改成功");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息...");
        Employee employee = employeeService.getById(id);
        if (employee !=null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
